Add privilege escalation to iscsi purge tasks
Add privilege escalation to iscsi purge tasks

Without the escalation, invocation from non-root
users with fail when accessing the rados config
object, or when attempting to log to /var/log

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1549004

Signed-off-by: Paul Cuzner <526e5967c1f778e480f386a4e768c83af6d400ed@redhat.com>

fgal/ceph-ansible,font/ceph-ansible,fgal/ceph-ansible,ceph/ceph-ansible,font/ceph-ansible,ceph/ceph-ansible